Lennox Hearth B-MPC0353VDE - Manual (Page 7)

7 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
ENSURE THAT THE FRONT GLASS PANEL IS IN
PLACE AND SEALED DURING ADJUSTMENT.
Figure 4
Burner Adjustments
The following paragraphs address burner ad-
justment concerns and procedures.
Flame Appearance and Sooting
Proper flame appearance is a matter of taste.
Generally most people prefer the warm glow of
a yellow to orange flame. Appliances operated
with air shutter openings that are too large will
exhibit flames that are blue and transparent.
These weak, blue and transparent flames are
termed anemic. If the air shutter opening is too
small sooting may develop.
Sooting is indicated by black puffs developing
at the tips of very long orange flames. Sooting
results in black deposits forming on the logs,
appliance inside surfaces and on exterior sur-
faces adjacent to the vent termination.
Sooting is caused by incomplete combustion in
the flames and a lack of combustion air entering
the air shutter opening. To achieve a warm
yellow to orange flame with an orange body that
does not soot, the shutter opening must be
adjusted between these two extremes. No smoke
or soot should be present. Reposition the logs if
the flames impinge on any of them.
If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
main burner tube should be adjusted. Normally,
the more offsets in the vent system, the greater
the need for the air shutter to be opened further.
Glass Door Latch
Lower Compartment Door and Hinge
Glass Door
Firebox Floor
Bottom Vee-flange
Glass Door Frame
Top Flange
Glass Door Frame
Modesty Panel
Adjustment
CAUTION: THE ADJUSTMENT ROD AND
NEARBY APPLIANCE SURFACES ARE HOT.
EXERCISE CAUTION TO AVOID INJURY WHILE
ADJUSTING FLAME APPEARANCE.
To adjust the flame, move the adjustment rod
(located in the lower control area) back or
forward to increase or reduce the air shutter
opening, respectively. Position the air shutter
to the factory setting as shown in
Figure 5 on
page 7. Allow the burner to operate for at least
15 minutes. Observe the flame continuously.
If it appears weak or sooty as previously de-
scribed, adjust the air shutter by pushing or
pulling on the adjustment rod until the flame
appearance is as desired.
The adjustment rod and associated adjustable air
shutter is patented technology. Flame adjust-
ments can be made quickly and accurately to
taste without the need of disassembling the
appliance and waiting for 30 minutes after each
adjustment.
Propane models may exhibit a flame pattern
that may candle or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closed as described in the previous para-
graphs. Operate the appliance for a period of
time as the effect diminishes, ensuring that the
appliance does not develop sooty flames.
When satisfied that the appliance operates
properly, proceed to finish the installation.
Leave the control knob in “ON” position and
turn the remote switch “OFF.” Close the lower
control compartment door.
1. Retrieve the glass door frame. Visually
inspect the gasket on the backside of the panel.
The gasket surface must be clean, free of ir-
regularities and seated firmly.
2. Position the door frame in front of the
firebox opening and engage the top flange
over the lip at the top of the firebox opening.
3. Swing the door down and back. Ensure the
gasket seats evenly as the door draws shut. Engage
the Vee-flange at the bottom of the door with the
latches and close the latches to secure the door.
4. Reinstall the bottom compartment door by
inserting the right side locating pin into the right
cabinet corner post and then the left side spring-
loaded pin into the left cabinet corner post.
5. Reinstall the top and bottom bustle, and the
top louver assembly or radiant panel.
To install the front glass enclosure panel,
proceed as follows:
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.